CN216362152U

CN216362152U - Annotate liquid hole sealing nail, lithium cell and electronic product thereof

Info

Publication number: CN216362152U
Application number: CN202122525285.9U
Authority: CN
Inventors: 王传宝
Original assignee: Dongguan Lithium Microelectronics Technology Co ltd
Current assignee: Dongguan Lithium Microelectronics Technology Co ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-04-22
Anticipated expiration: 2031-10-20

Abstract

The utility model belongs to the technical field of lithium batteries, and particularly discloses a liquid injection hole sealing nail, a lithium battery and an electronic product thereof, wherein the liquid injection hole sealing nail comprises a first base body and a second base body, a groove is arranged at the lower end of the first base body, and the middle part of the upper end of the first base body protrudes outwards to form a boss structure; the upper end of the second base body is matched with the groove, and the second base body is inserted into the groove. Pass through the hot melt complex mode with first base member and second base member, make both compound into a whole, the second base member is inserted through interference fit's mode and is established annotating the liquid downthehole, the sealing performance who annotates the liquid hole has been strengthened, can guarantee that the battery is inside to keep vacuum state, first base member upper end middle part is provided with the boss structure, not only be convenient for with the second base member precession annotate the liquid hole soon, it is sealed to make it warp, can also prevent that first base member and second base member from taking place the separation, the structure fastness of annotating the sealed nail in liquid hole is annotated in the reinforcing, can effectively avoid the battery to appear bulging and the emergence of the lithium inefficacy scheduling problem of separating.

Description

Annotate liquid hole sealing nail, lithium cell and electronic product thereof

Technical Field

The utility model belongs to the technical field of lithium batteries, and particularly relates to a liquid injection hole sealing nail, a lithium battery and an electronic product thereof.

Background

In some cases of small-sized steel shell batteries, a liquid filling hole of the battery is sealed, because the steel shell is small in volume and inconvenient to operate, a sealing part is required to be small and exquisite and has a simple structure, the sealing structure of the sealing part is generally different from that of a large steel shell/aluminum shell, the large steel shell/aluminum shell is generally in vacuum, a sealing nail is firstly adopted for sealing and then welding, the small steel shell is directly sealed by using a metal thin gasket under normal pressure through laser welding, although the operation is simple, the inside of the battery is not vacuum, gases exist, the subsequent gases can cause the excessive thickness of the battery or even cause the obvious bulging of the battery, and the residual gases can be left on the surface of an electrode to form bubbles, so that the risk of lithium precipitation failure of the battery exists.

SUMMERY OF THE UTILITY MODEL

One of the objects of the present invention is: through providing a annotate liquid hole seal nail, its leakproofness that can effectively improve annotate the liquid hole guarantees that the battery is inside to be in vacuum state all the time, is favorable to getting rid of battery gas, can effectively avoid the battery to appear bulging and the emergence of the lithium inefficacy scheduling problem of separating out.

In order to achieve the purpose, the utility model adopts the following technical scheme: a liquid injection hole sealing nail comprises a first base body and a second base body, wherein a groove is formed in the lower end of the first base body, and the middle of the upper end of the first base body protrudes outwards to form a boss structure; the upper end of the second base body is matched with the groove, and the second base body is inserted into the groove.

Further, the second base is made of one of rubber, PFA, PP and PE.

Further, the first substrate is made of one of stainless steel, nickel, and aluminum.

Further, the boss structure is in a straight shape or a cross shape.

Further, the diameter of the first substrate is larger than the diameter of the second substrate.

Further, the diameter of the second base body is uniformly reduced from the upper end to the lower end.

Further, the first substrate and the second substrate are coaxially disposed.

The second purpose of the utility model is: the utility model provides a lithium battery, including apron, casing, electric core and annotate the liquid hole seal nail as above-mentioned, the casing is provided with one and opens the mouth, apron fixed mounting in on the casing and the closing cap open the mouth, casing lateral wall is provided with annotates the liquid hole, the second base member is inserted through interference fit's mode and is established annotate in the liquid hole.

The battery cell is composed of a positive plate, a negative plate and an isolating membrane in a winding or stacking mode, a positive tab is arranged on the positive plate, a negative tab is arranged on the negative plate, and the positive tab and the negative tab are led out from the same end.

The third purpose of the utility model is that: an electronic product is provided, which comprises the lithium battery.

The utility model has the beneficial effects that: a liquid injection hole sealing nail comprises a first base body and a second base body, wherein a groove is formed in the lower end of the first base body, and the middle of the upper end of the first base body protrudes outwards to form a boss structure; the upper end of the second base body is matched with the groove, and the second base body is inserted into the groove. According to the liquid injection hole sealing nail provided by the utility model, the first base body and the second base body are compounded into a whole in a hot melting compounding mode, the second base body is inserted into the liquid injection hole in an interference fit mode, the sealing performance of the liquid injection hole is enhanced, the vacuum state of the interior of a battery can be guaranteed, the boss structure is arranged in the middle of the upper end of the first base body, the second base body can be conveniently screwed into the liquid injection hole to be deformed and sealed, the first base body and the second base body can be prevented from being separated, the structural firmness of the liquid injection hole sealing nail is enhanced, the sealing performance of the liquid injection hole can be effectively improved, the interior of the battery is guaranteed to be always in the vacuum state, the gas of the battery can be favorably discharged, and the problems of bulging, lithium precipitation failure and the like of the battery can be effectively avoided.

Drawings

FIG. 1 is a schematic structural view of a pour hole sealing nail in example 1 of the present invention;

FIG. 2 is a second schematic structural view of a liquid injection hole sealing nail in example 1 of the present invention;

FIG. 3 is a schematic structural view of a first substrate in example 1 of the present invention;

FIG. 4 is a second schematic structural diagram of the first substrate in example 1 of the present invention;

fig. 5 is a schematic structural diagram of a lithium battery in embodiment 2 of the present invention;

FIG. 6 is an enlarged view of part A of FIG. 5;

fig. 7 is one of the schematic structural diagrams of the case of the lithium battery in embodiment 2 of the present invention;

fig. 8 is a second schematic structural diagram of a lithium battery case according to embodiment 2 of the present invention;

fig. 9 is a third schematic view of a housing structure of a lithium battery in embodiment 2 of the utility model.

Wherein: 1. a first substrate; 11. a groove; 12. a boss structure; 2. a second substrate; 3. a cover plate; 4. a housing; 5. an electric core; 6. a positive post; 7. and a negative electrode welding sheet.

Detailed Description

In the description of the application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal ", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, or an electrical connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In order to make the technical solutions and advantages of the present invention clearer, the present invention and its advantages will be described in further detail below with reference to the following detailed description and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example 1

As shown in fig. 1 to 4, the liquid injection hole sealing nail provided in this embodiment 1 includes a first base 1 and a second base 2, a groove 11 is provided at a lower end of the first base 1, and a boss structure 12 is formed by protruding an upper middle portion of the first base 1; the upper end of the second base body 2 is matched with the groove 11, and the second base body 2 is inserted into the groove 11. According to the liquid injection hole sealing nail provided by the utility model, the first base body 1 and the second base body 2 are compounded into a whole in a hot melting compounding mode, the second base body 2 is inserted into the liquid injection hole in an interference fit mode, the sealing performance of the liquid injection hole is enhanced, the vacuum state of the interior of a battery can be guaranteed, the boss structure 12 is arranged in the middle of the upper end of the first base body 1, the second base body 2 is conveniently screwed into the liquid injection hole to be deformed and sealed, the first base body 1 and the second base body 2 can be prevented from being separated, and the structural firmness of the liquid injection hole sealing nail is enhanced.

In order to improve the sealability of the pour hole, the second base body 2 is made of one of rubber, PFA, PP, and PE. The material for manufacturing the first substrate 1 is not limited to the polymer material listed in embodiment 1, and other soft materials may be selected according to actual production requirements.

Preferably, the first substrate 1 is made of one of stainless steel, nickel and aluminum. The material of the first base 1 is not limited to the metal material listed in embodiment 1, and other metal materials can be selected according to actual production requirements, and the first base 1 and the case 4 are bonded together by metal bonds after the first base 1 and the case 4 are fixedly connected together by laser welding technology, so that the sealing performance of the liquid filling hole can be enhanced.

In order to improve the composite firmness between the first base body 1 and the second base body 2, the middle part of the upper end of the first base body 1 is provided with a boss structure 12, the middle part of the lower end of the first base body 1 is inwards recessed to form a groove 11, the boss structure 12 and the groove 11 are coaxially arranged, and in the embodiment 1, the boss structure 12 is in a straight shape or in a cross shape.

In order to enable the first base body 1 and the casing 4 provided with the pour hole to have a large contact area, thereby enhancing the sealing performance of the pour hole, the diameter of the first base body 1 is larger than the diameter of the second base body 2. Due to the structural design, the first base body 1 is conveniently welded on the shell 4 through laser, after the first base body 1 and the shell 4 are welded, melted and cooled, the first base body 1 and the shell 4 are bonded together through metal bonds, the welding effect is improved, the interior of the battery has good sealing performance, and the interior of the battery can be further guaranteed to be in a vacuum environment.

Preferably, the diameter of the second substrate 2 is uniformly reduced from the upper end to the lower end. The structure design is convenient for screwing the second basal body 2 into the liquid injection hole.

Preferably, the first and

second substrates

1, 2 are arranged coaxially. Due to the structural design, the connection firmness of the first base body 1 and the second base body 2 is improved, and meanwhile, the sealing performance of the liquid injection hole is also improved.

Example 2

As shown in fig. 5 to 9, the present embodiment 2 provides a lithium battery, which includes a cover plate 3, a casing 4, a battery cell 5, and a liquid injection hole sealing nail as in embodiment 1, wherein the casing 4 is provided with an open opening, the cover plate 3 is fixedly mounted on the casing 4 and covers the open opening, a side wall of the casing 4 is provided with a liquid injection hole, and the second base body 2 is inserted into the liquid injection hole by way of interference fit.

The battery cell 5 is composed of a positive plate, a negative plate and an isolating film in a winding or stacking mode, a positive tab is arranged on the positive plate, a negative tab is arranged on the negative plate, and the positive tab and the negative tab are led out from the same end.

In this embodiment 2, when the winding structure is adopted, the positive tab is an aluminum tape, the negative tab is a copper nickel-plating tape (a copper tape and a nickel tape), and both the positive tab and the negative tab are welded on the empty foil of the corresponding pole piece by ultrasonic welding. When the stacking structure is adopted, the positive electrode tab is an aluminum foil cluster, and the negative electrode tab is a copper foil cluster, which are formed by welding multiple layers of foils through ultrasonic waves.

Specifically, be provided with anodal post 6 on casing 4, anodal post 6 wears to establish on casing 4, and be provided with insulating seal between anodal post 6 and the casing 4, play insulating seal's effect, be provided with negative pole welded piece 7 on casing 4, negative pole welded piece 7 passes through laser welding, direct fixed mounting is in one side that electric core 5 was kept away from to casing 4, anodal ear passes through ultrasonic welding, resistance welding or laser welding are on anodal post 6 (the material is aluminium, nickel, one of the stainless steel), the negative pole ear passes through resistance welding or laser welding lug and welds one side at casing 4. The non-welding point of the aluminum strip needs to be subjected to insulation treatment, and the insulation treatment mode comprises the steps of not limiting to hot-pressing PP glue, pasting insulating gummed paper, coating insulating glue and the like. In this embodiment 2, the positive electrode post 6, the liquid injection hole and the negative electrode soldering tab 7 may also be disposed on the cover plate 3, and a sealing nail for the liquid injection hole is inserted into the liquid injection hole for sealing the liquid injection hole and preventing the electrolyte inside the battery from reacting with the outside air.

Specifically, the cover plate 3 is welded to the opening of the housing 4 by laser welding and is sealed, and for convenience of welding, the cover plate 3 and the opening of the housing 4 can be made into a step shape which is matched with each other in structure.

Example 3

An electronic product provided in embodiment 3 includes the lithium battery in embodiment 2. In this embodiment 3, the electronic product includes, but is not limited to, a small electronic device such as a bluetooth headset, a remote controller, a fluorescent stick, an electronic watch, and a computer motherboard.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should understand that the embodiments as a whole may be combined as appropriate to form other embodiments understood by those skilled in the art.

Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the utility model as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. The utility model provides a annotate liquid hole seal nail which characterized in that: comprises that

The device comprises a first base body (1), wherein a groove (11) is formed in the lower end of the first base body (1), and the middle of the upper end of the first base body (1) protrudes outwards to form a boss structure (12);

the upper end of the second base body (2) is matched with the groove (11), and the second base body (2) is inserted into the groove (11).

2. The liquid filling hole sealing nail as set forth in claim 1, wherein: the second substrate (2) is made of one of rubber, PFA, PP and PE.

3. The liquid filling hole sealing nail as set forth in claim 1, wherein: the first substrate (1) is made of one of stainless steel, nickel and aluminum.

4. The liquid filling hole sealing nail as set forth in claim 1, wherein: the boss structure (12) is in a straight shape or a cross shape.

5. The liquid filling hole sealing nail as set forth in claim 1, wherein: the diameter of the first base body (1) is larger than the diameter of the second base body (2).

6. The liquid filling hole sealing nail as set forth in claim 1, wherein: the diameter of the second base body (2) is uniformly reduced from the upper end to the lower end.

7. The liquid filling hole sealing nail as set forth in claim 1, wherein: the first base body (1) and the second base body (2) are coaxially arranged.

8. A lithium battery, characterized in that: the liquid injection hole sealing nail comprises a cover plate (3), a shell (4), a battery cell (5) and the liquid injection hole sealing nail as claimed in any one of claims 1 to 7, wherein the shell (4) is provided with an open opening, the cover plate (3) is fixedly installed on the shell (4) and covers the open opening, a liquid injection hole is formed in one side wall of the shell (4), and the second base body (2) is inserted into the liquid injection hole in an interference fit mode.

9. A lithium battery as claimed in claim 8, characterized in that: the battery cell (5) is composed of a positive plate, a negative plate and a separation film in a winding or stacking mode.

10. An electronic product characterized by comprising the lithium battery according to claim 9.